Experimental determination and thermodynamic assessment of the phase diagram in the Co-Zr system

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	Experimental determination and thermodynamic assessment of the phase diagram in the Co-Zr system
	Liu, X. J. ; Zhang, H. H. ; Wang, C. P. ; Ishida, K. ; Wang CP(王翠萍)
刊名	http://dx.doi.org/10.1016/j.jallcom.2009.04.032
	2009-08-12
关键词	ALLOYS
英文摘要	National Natural Science Foundation of China [50425101, 50571084, 50771087, 50771088]; Ministry of Science and Technology [2009DFA52170]; Ministry of Education, P.R. China [20050384003, 707037]; Grant-in-Aid Core Research for Evolutional Science, and Tech; The phase diagram in the Co-Zr system was determined using the electron probe microanalyzer (EPMA), differential thermal analysis (DTA) and X-ray diffraction (XRD) technique. The experimental results indicate that (1) the solubility region of the Co(2)Zr phase is from 25 to 34 at.% Zr; (2) the CoZr(3) phase exists and the temperature of the peritectoid reaction (CoZr(2) + (beta Zr) <-> CoZr(3)) is about 981 degrees C; (3) the solubilities of Zr in the (alpha Co) phase and Co in the (beta Zr) phase are about 0.15 and 2.5 at.%, respectively. A thermodynamic assessment of the Co-Zr binary system was carried out by the CALPHAD (calculation of phase diagrams) method. The Gibbs free energies of the solution phases (liquid, fcc, bcc and hcp) were described by the subregular solution model, and those of the intermetallic compounds (Co(11)Zr(2), Co(23)Zr(6), Co(2)Zr, CoZr, CoZr(2) and CoZr(3)) were described by the sublattice model. A proper set of the thermodynamic parameters has been derived for describing the Gibbs free energies of each phase in the Co-Zr system. An agreement between the calculated results and experimental data is obtained. (c) 2009 Elsevier B.V. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/59713]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Liu, X. J.,Zhang, H. H.,Wang, C. P.,et al. Experimental determination and thermodynamic assessment of the phase diagram in the Co-Zr system[J]. http://dx.doi.org/10.1016/j.jallcom.2009.04.032,2009.
APA	Liu, X. J.,Zhang, H. H.,Wang, C. P.,Ishida, K.,&王翠萍.(2009).Experimental determination and thermodynamic assessment of the phase diagram in the Co-Zr system.http://dx.doi.org/10.1016/j.jallcom.2009.04.032.
MLA	Liu, X. J.,et al."Experimental determination and thermodynamic assessment of the phase diagram in the Co-Zr system".http://dx.doi.org/10.1016/j.jallcom.2009.04.032 (2009).